Oil-well pump



Feb. 16 1926.

. W. J. SMITH ,OIL WELL PUMP Filed April 6, 1925 2 sums-sheet 1 Feb.. 16 1926. 1,573,584

w. J. SMITH oIL WELL PUMP Find April e, 1925 2 sheets-Sheet 2 "7l/W a@ 2 mento@ @Hoang Patented Feb. Y"16, 1926.

UNITED .s'rArslrArl-:ur oFFi-ca.Y

WILLIAM J. SMITH, F PHILADELPIIIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO WILLIAM- B. BLAIR, OF PHILADELPHIA, PENNSYLVANIA.`

OIL-WELL PUMP.

Application mea Alim e, 1925; seai No. 20,899.

T 0 all 'whom t may concern.'

Be it knownthat I, l-VILLIAM' J .1 SMITH, a citizen of thel United States, residing at Philadelphia, in the county of Phlladelphla and State of Pennsylvanla, have invented certain new and l"useful Improvements injustment or repair, to' raise fluid from ther bottomof a well. A further object of the invention is to provide, in a pump ofthe kind referred to, in slmple form,a motor and fluid forcing means connected "there' with adapted to be lowered 1nto a cased well,- a connection between the motor anda pumpor other fluid-forcing means located at'the top of a well for supplying the motorwith an operating fluid,y and means whereby the fluid in the well shall be forced upwardin the casing and discharged from the tap thereof.

IVhile the pump isy hereinafter described.

in connection with a cased oil'well, and' is particularly intended for raising oil in a well ofthis form, it is notintended in this way to limit the' scope ofy the invention, as the construction'involvedisadapted for use in many otherksimilar positions;

A simple form of embodiment of the invention is illustrated in the accompanying drawing, in which: f

Figure 1 .is a 'central verticalv sectional View of the pump, a portiony of the casing of a Wellin which the pump vis located in use being also shown in section..

Figure 2 is a horizontalsectional view on the line 2-2 of Figure 1.

Figure -3 is a vhorizontal sectional view yon the line 3'3 of Figure 1.

Figure 4 is a horlzontal sectional view on the line 4 4 of Figure 1. v

Figure 5 isa horizontal sectional 'view on the line 5-5 of Figure 1 In this drawing'l representsthe casing of a wen, which is of' the usual yC ylndrical form, of equa-l diameterthroughout, and is preferably provided at its lower end, "intended to be located at or near the bottom4 ot' a'well from which the contents are to'be withdrawn, with perforations2 foradmitting, in conjunction with the vopen lower end of the caslng, the contents ofthe well into the casing.' .Y

In the form of pump herein shown all the working parts are contained in a cylindrical body 3, which in diameter issomewhat less than that of the casing 1. IThis outer face of the body jis provided with anumber of f projecting longitudinal ribse'to serve as guides and forpreventing canting'and'wedg'- ving of the cyllnderin lowering 'or raising .the pump in the'casing 1, and for'positionf ing the cylinder when in the casinginmsuch.

relation to the casing as to maintain a. un1, form circular space between the two. One

of thexribs 5 is formed with a passage i extending through it, such passage forming part of one of the conduitsgbywhich a fluid 1s introduced into and withdrawnifromthe pump in the operation of the'latter.`

Arranged in the upper end of the cylinder( 3 is a screw head 7 having an opening Areceiving the end of a (pipe or tube 8'tl1r`ouglif .85

which operating Vfiui 1s received, and pro,- vlded with an eye bolt 9 for the attachment of 'a rope or the like used 4in lowering the Y i pump into a well or raisingV it therefroInQi-*g'l The interior of the cylinder lhasfin itan 1 "r form the motor chamber 11 and the suc partition 10, which divides the cylinderv to tion chamber 12. The partitionhas in 'it a screw threaded central openingl which "re ceives the hollow screw threaded stem 13 of a circular valve seat'14, the stembeing held in place in the partition by a binding nut 15. The valveseat 1-s spaced from the lower face of the partition forming a chamber 16 which is connected by openings 17 with the space between the pump and the casing 1 when the pump is in position for use in the casing. Arranged in the chamber 16 is a disk valve 18 having a central opening receiving the stem 13 of the Valve seat, and by which it is guided in its up and down movements in the operation of the pump. The `valve seat 14 ibo has in "it, a series of openings 19 through'fwhich communication is established between the suction chamber 12 and the ,chamber 16,

such openings being automatically altertive position by a headed screw 23 passing let and outlet openings of the suction cham- J through the valve and entering the partition. p i l In order that the lowery portionof the space between the pump and the casing of the well, when the pump is in position for use, and the upper portion of suehspace, may be separated, and thus, while oil may be drawn from the lower portion, the uppermay serve as a conduit for the oil to be raised, the pump is so constructed as to shut off communication between those parts of the space. This may be accomplished in many ways, preferably by providing the exterior of the pump with'a flexiblejprojection which surrounds the pump and fills the space between the pump and thewell cas-V ing, and a simple means forthe purpose is shown in the drawings. This consists of a leather cup packing 24 ofjan exterior diameter corresponding to the interior diameter` of the casing 1, and located between the inber of the pump. The lower flangelportion 25 of the packing is secured between aI circumferential rib 26' extending from the outer face of the cylinder and Aa screw ,ring 27 engaging screw threads' onv the outer face of the cylinder. This, attaching means allows the ready securing of the packing and .permits of the quick removal and replacement of worn or injured packing. y

The pump is operated by a uid under pressure alternately introduced and withdrawn from the top of the motor -chamber 11 through the pipe or tube 8, and correspondingly introduced and withdrawn from the bottom of the chamber through a pipe or tube 28, the passage 6 and the port 29 connecting the passage and the lower part of the motor chamber. The Huid may be introduced and withdrawn by any suitable means, as .by a pump, not shown, 'at the top of the well. f

Located in the chamber 11 is a piston 30 having connected therewith a piston rod 31 which extends through the hollow stem 13 of the valve seat 14. In the stem and surrounding the rod is a gland packing 32 by which passage of fluid under pressure from one of the chambers 11 and v12 to the other f is prevented. Connected to the piston rod 31, and located in the suction chamber 12, is

a piston 33. This piston has openings 34 'movement of the extending through it, and has 4onits upper face a ,diskfvalve 35 Vprovided-witha central pressure of a liuid, on theupward movement of the piston, and will be raised from its seat to expose the openings on the downward v movement of the piston.

In the use of the pump, assuming it to have been lowered into the casing of a well to a. position where the fluid -to 'be raised enters the lower portion ofthe casing of the pump, a fluid is alternately introduced into the motor chamber, through the described conduits, above and below the piston 30, causing the ylatter to reciprocate. This reciprocating movement being transmitted to the piston 33, the -latter in its upzward movement acts as a sucker to draw into the chamber 12, through the openings in the partition 20, and the openings 2 in the cylinder 1,AV the liquid contained p in the.

well, the valve. 22 being in this movement raised to expose the openings through the partition.- i movement acts asa ram to force a liquid previously drawn linto the chamber 12, rais,- ing the valve 18, and thus establishing a communication through 't'he chamber 16 and the ports 17 to thespace between the pump and the casingof the well, and thence into the casing above the pump, by which the liquid is conducted to discharge at the top of the. well. of the PlStOIi 33""tlie valve 35 isA opened and the valve22 in the lower partition` is closed.'`

Consequently, the'A fluid drawn intov the-f,

chamber 12 .inthe upward movement ofthe'I i passes through the openings 34 in.,vr the piston, 33, and on the .ensuing upward n `piston it is trapped and forced through-the course described, ultipiston mately to the top of the well. By reason of the packing or dam established in the space between Ythe pump and the casing of` the well, no interference between the suction' and forcing operations of the asy the cup packing will be expanded by `the imposition-of the weight of the column of the fluid being raised in the casing, and the greater the weight so imposed, the greater lexpansion and consequent effectiveness of the packingv for its'desi'gned purpose. f

I claim:

1. A pump of the kind described comprising a cylindrical shell or casing provided with elongated exterior ribs extending longitudinally of tliefsliell or casing, a -piston'located-i'n'the` shell or casing, means or reciprocating the piston,'a second piston 'connected and movable andlocated in a chamber having inlet andy outlet openings, thev exterior of the shell On the downward movement *The* piston 33 in its upward pump isv possible,

with the first, I

or casing being provided with a surrounding iexible' projection located between the inlet and outlet openings of the chamber.

2. A well casing, a pump of the kind described comprising a shell or casing less in diameter than the casing of the well adapted to be lowered into the casing, septate chambers in the shell or casing of the pump, a piston arranged in one chamber, means for alternately pressure to the opposite sides of the piston for reciprocating it, and a valved piston connected to the first, and located in a second chamber having inlet openings and Communicating with the space between the pump and the casing.

3. A well casing, a pump of the kind described comprising a shell or casing of less diameter than the casing of the well, adapted to be lowered into the casing, septate chambers in the shell or casing of the pump, a piston arranged in one chamber,

vmeans for admitting a iiuid under pressurey admitting a liuid under,l

to the opposite sides of the piston alternately, forfreciprocating it, anda Valved piston connected to the first and located in a second chamber having inlet openings and 'Communicating with the space between the shell or casing of the pump and the well casing, the shell or casing' of the pump being provided with an exterior packing adapted to dam the space between the pump and the well casing.

4. A pump-of the kind described comprising a cylindrical shell or casing provided with elongated exterior ribs extending longitudinally of the shell or casing.

5. A pump of the kind described compris'ng a cylindrical shell or casing provided with elongated external ribs eXtending longitudinally of the shell or casing, one of such ribs having a passage therethrough.

In testimony whereof I afX my signature.

WILLIAM J. SMITH. 

